vty: fix doc typo

Change-Id: I9f1112fc27dfe967b4a007648ddda1050e9bd9fa
diff --git a/src/vty/telnet_interface.c b/src/vty/telnet_interface.c
index 374578c..132cd2e 100644
--- a/src/vty/telnet_interface.c
+++ b/src/vty/telnet_interface.c
@@ -104,7 +104,7 @@
 /*! Initializes telnet based VTY interface using the configured bind addr/port.
  *  \param[in] tall_ctx \ref talloc context
  *  \param[in] priv private data to be passed to callback
- *  \param[in] default_port TCP port number to bind to if not explicitely configured
+ *  \param[in] default_port TCP port number to bind to if not explicitly configured
  */
 int telnet_init_default(void *tall_ctx, void *priv, int default_port)
 {